★Historically significant

This 1973 CIA CONFIDENTIAL HUMINT report from inside the Soviet Sary Shagan weapons testing range includes one of the few Cold War-era CIA intelligence reports to formally document a UAP observation by a source operating within a sensitive Soviet military installation.

CIA-UAP-D001, Intelligence Information Report, USSR, 1973

Central Intelligence AgencyPDFIncident ReportCONFIDENTIALModerate redactionPURSUE Release 2

4/10

niche or mildly interesting

UAP Insight significance score

Location: USSR
Incident date: 12/20/73
Duration: Within minutes (circles formed within 10-15 seconds, coloring disappeared within minutes)
Witnesses: Single witness
Released: May 22, 2026

UAP Characteristics

◉ DiscLuminousColor change

Evidence Types

Testimony

Official Conclusion

Unresolved; source had no opinion as to what the phenomenon was and there were no resultant rumors.

Official Description

This document is a Central Intelligence Agency (CIA) intelligence information report (IIR) that describes human intelligence gathering activities in the Union of Soviet Socialist Republics (USSR). This report characterizes its content as informational, not as finally evaluated intelligence. In section 14 of this document, the source describes an incident occurring in summer of 1973, where he allegedly observed an airborne, luminous, bright green, unidentified object. The source described concentric circles forming around the phenomenon over a period of several minutes, before it dissipated. The source also stated that no sound attended the observation. The source offered no opinion on the nature of the phenomenon and was unable to provide further details regarding the incident.

Key Findings

→In late summer 1973, a source at the Sary Shagan weapons testing range observed a bright green circular object or mass in the sky to the west at approximately 70 degrees elevation.
→Within 10-15 seconds, the green circle widened and several green concentric circles formed around the mass, disappearing within minutes.
→The phenomenon was silent, with no explosion or associated sound; altitude was undeterminable and no diameter estimate was possible.
→The source had no opinion on the nature of the phenomenon and reported no resultant rumors among personnel at the site.
→The report also covers Soviet missile warhead technical details (SA-2, ABM-1/GALOSH) and hearsay about laser weapons experiments at the range.

UAP Insight Analysis— AI generated, not official

A CIA Intelligence Information Report (CONFIDENTIAL) from December 1973, based on human intelligence from a former Soviet citizen who served at the Sary Shagan weapons testing range. The report covers facilities, missile warhead systems (SA-2, ABM-1/GALOSH), rumored laser weapons research, and includes one brief account (paragraph 14) of an unidentified aerial phenomenon observed by the source in late summer 1973 at Site 7 of the range.

Analyst Notes

Single-witness human intelligence report with no corroborating sensor data; source had no opinion on the nature of the phenomenon and could provide no further details. The phenomenon may have a mundane explanation such as a missile test, rocket exhaust, or atmospheric optical effect given proximity to an active weapons testing range. The UAP section is a brief aside within a broader HUMINT collection effort focused on Soviet weapons systems. Source identity and reliability are not fully visible due to redactions.

Extracted Entities

Agencies & Organizations

Central Intelligence Agency (CIA)Directorate of OperationsNSADIAState DepartmentFBINSAOSRNPIC

Locations

Sary Shagan Weapons Testing RangeSite 4Site 7Site 35USSRGermany

Aircraft & Objects

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AI analysis by claude-sonnet-4-6 · May 23, 2026